TECHNICAL R EFERENCE8-4Typing Commands• Type commands in either upper or lower case, not a combination. Use theBackspace key to delete errors. (You cannot delete the original AT commandsince it is stored in the modem buffer.)• If a command has numeric options and you don’t include a number, zero isassumed. For example, if you type ATB, the command ATB0 is assumed.• Every command except A/, +++, and A> must begin with the AT prefix and beentered by pressing ENTER.• The maximum command length is 58 characters. The modem doesn’t count the ATprefix, carriage returns, or spaces.NOTE: All defaults are based on the &F1Hardware Flow Control templateloaded in NVRAM when the modem is shipped. Defaults are listed in italics.